<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		
  
	</head>
	<body>
	<div class="div1">
	<section>
	<input type="button" class="active"  value="按钮1" />
	<input type="button" value="按钮2" />
	<input type="button" value="按钮3" />
	</section>
	<ul>
		<li class="show">1</li>
		<li>2</li>
		<li>3</li>
	</ul>
	</div>
   
	</body>
</html>
